Flour-bolting machine.



No. 865 846. PATENTED SEPT. s 1907.

T. w. GRAHAM.

FLOUR BOLTING MACHINE.

APPLICATION FILED DEO.30,1904.

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ball and socket joint (1.

THOMAS W. GRAHAM, OF DUBUQUE, IOWA.

FLOUR-BOLTING MACHINE.

Specification of Letters Patent.

Patented Sept. 3, 1907.

Application filed December 30, 1904. Serial No. 238,946.

To all whom it may concern:

Be it known -that I, THOMAS W. GRAHAM, a citizen of the United States, residing at Dubuque, in the county of Dubuque and State of Iowa, have invented certain new and useful .Improvcments in Flour-Bolting Ma chines, of which the following is a specification, reference being bad therein to the accompanying drawing.

This invention relates to an improvement in flour bolting machines andmore particularly to that class of bolting machines in which a sieve carrying frame is suspended by flexible hangers and given a gyratory movement to cause the flour to sift through the'screens, and the object of the invention is the provision of a simple and efficient means for imparting the gyratory movemeut to the sieve carrying frame.

The invention contemplates broadly a sieve carrying frame or box, flexibly supported so that it can be given a gyratory movement in combination with means for imparting said movement to the frame which means comprises a driving shaft having a connection so consl rncted that the shaft while rotating may have a swinging movement without disengaging or escaping its bearings, driving means for rotating the shaft, and a weighted part or member eccentrically positioned relative to the shaft.

In the drawings, wherein -a preferable embodiment of my invention is shown, like numerals of reference refer to similar parts in the several views.

Figure l, is a side elevation of my improved sieve bolting machine, parts being shown in section; Fig. 2, is a plan view of the sieve carrying frame, the flexible hangers being shown in cross-section.

Referring now more particularly to the drawings, A designates a sieve carrying frame, of any suitable construction, which is suspended from the supporting member B by the flexible hangers C. Four of these hangers (3 are used, one at each corner of the frame, and as they form no part of my invention, they may be of any of the well known types used in this art. A gyratory movement is given to the sieve carrying frame by means of a drive shaft D, which has its upper end movably supported in the supporting member B and its lower end opera'tively associated with the sieve carrying frame. A drive pulley D is secured to the shaft D and is adapted to be driven by a belt D which is in turn driven from any suitable source of power. In the drawing accompanying this specification, I have shown the lower end of the shaft D connected to the sieve carrying frame by In the form shown in the drawings, I have also shown the drive pulley as secured to the upper end of the shaft D-and connected at its hub by a ball and socket joint d to a vertically disposed rod (1 secured in the supporting member B. The rod (1 is loosely mounted in the supporting member so as to permit the longitudinal movement thereof, when the shaft D is rotated. I do not, however, desire to limit myself to the precise form of connection shown in the drawings, as it is obvious that the upper end of the shaft D may be movably supported in any suitable manner from the supporting member D, and that the lower end of the shaft may be connected in any suitable manner to the sieve carrying frame to cause the same to travel therewith. It will also be obvious that the drive pulley D need not be secured to the shaft D, as the same may be driven in any suitable manner. E designates a weight detachably secured to the lower end of the shaft D and eccentrically disposed relative thereto.

From the construction thus described, it will be obvious that when power is applied to the belt D the pulley D,will be driven and with it the drive shaft D, and, owing to the weight E, the lower end of said drive shaft and the sieve carrying frame will be caused to travel in an orbit. The amount of gyration of the sieve carrying frame can be regulated by varying the size of the weight, which is secured to the shaft D. 1t will be apparent that the weight E may be otherwise secured or positioned relative to the frame, so long as it is eccentrically disposed relative to said shaft. In the form shown in the drawings the pulley D will necessarily be given a slight wabbling motion upon the rotation of the shaft D, and 1 therefore provide said pulley with a 'very wide rim to prevent the belt D from being thrown off said pulley by the movement thereof. 7

I do not desire to limit myself to the precise form and construction shown in the drawings, as it is obvious that many changes might be made thereto without departing from the spirit of the invention.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

1. In a device of the character described, a supporting member, a sieve carrying frame suspended therefrom by flexible hangers, a rigid drive shaft interposed between the supporting member and sieve carrying frame, the ends of said drive shaft being directly connected by universal joints respectively to thesupporting member intermediate its connection with the hangers and to the center of the top of the sieve carrying frame, and an offset weight for causing the lower end of the drive shaft to travel in an orbit upon rotation.

2. In a device of the character described, a supporting member, a sieve carrying frame suspended therefrom by flexible hangers, a rigid drive shaft flexibly suspended from the supporting member centrally of its connection with the hangers by means permitting a longitudinal movement thereof, and having its lower end directly connected by :1 flexible connection to the center of the sieve cariin;; frame, and an offset weight carried by said drive shaft 3. In a device of the character described, a supper ing member, a sieve carrying frame suspended therefrom by flexible hangers, and a single driving means for imparting a gyratory movement to said frame comprising a straight rigid drive shaft interposed between the supporting member and the sieve carrying frame, flexible joints-directly connecting the ends of the drive shaft'with the supporting member, and sieve carrying frame intermediate their connections with the flexible hangers, and means carried by the rigid drive shaft for causing the end thereof connected 104ting a longitudinal movement of said shaft during rotation thereof, an offset weight carried by said shaft adjacent its connections with the sieve carrying frame, and means for rotating said shaft.

5. In a device of the character described, a supporting member, a sieve carrying frame suspended therefrom by flexible hangers, a drive shaft, a vertically, movable rod mounted in said supporting member intermediate the upper ends of the hangers, a universal joint connection between the upper end of the drive shaft and the lower end of the vertically movable rod, a universal joint connection between the lower end of the drive shaft and the top of the sieve carrying frame and intermediate its connection with the hangers, a drive pulley secured to the upper end of the said shaft and an offset weight carried by the lower end of said shaft.

6. The combination of a gyratory separator frame, a driving shaft connected with said frame by a universal joint and capable of changing its angle with reference to said frame, means for rotating said shaft, and a gyratory weight mounted eccentrically on said driving shaft, sub- 30 stantially as set forth.

7. The combination of a gyratory separator frame, a ,l driving shaft having its end connected with said frame by a ball and socket joint and capable of changing its angle with reference to said frame, means for rotating said shaft, 35

and a gyratory weight mounted eccentricaliy on said driving shaft, substantially as set forth.

In testimony whereof he afiixes his signature in presence of two witnesses.

THOMAS w. GRAHAM.

Witnesses:

F. THonNnm', F. H. WILLIAMS. 

